import java.io.IOException;
import java.util.Scanner;

public class Test {
    public static void main(String[] args) throws IOException{
        String[] ss = {"abcd", "efg"};
        StringBuffer s = new StringBuffer();
        for (int i = 0; i < ss.length; i++) {
            s.append(ss[i]);
        }
        String tmp = s.toString();
        System.out.println(tmp);
    }
    public static void main1(String[] args) throws IOException {
        Scanner tmp = new Scanner(System.in);
//        //String a = tmp.next();
//        String b = tmp.nextLine();
//        System.out.println(b);
//        char a = tmp.next().charAt(0);
//        System.out.println(a);
//        char b = (char)System.in.read();
//        System.out.println(b);
        String t = tmp.nextLine();
        char []t1 = t.toCharArray();
        System.out.println(t1[1]);
    }
}
